Decided to do some more hacking on the project, so I pulled master and discovered my output now looks like the attached. Small picture in the upper right streaking out to fill the reset of the screen. I did a git bisect to figure out where things broke and this commit did it:

You can lookup me (gregory) in author patch to detect which version contains the fix. However, geometry shader was fixed later (but it can still be disabled). The best will be to go to 11.2 (or 11.1.3).

I'm running Ubuntu Trusty (14.04), hacked up with various ppa's to get newer software and some custom build packages. I'll see if I can find a ppa for 11.2 (or 11.1.3), but I feel like I'm going to have to compile this one myself.